Rydberg : Studies ox Rocky Mountain Flora 187 



leaves 5—10 cm. long, narrowly oblanceolate, the first ones sub- 

 entire, but most of them serrate except at the tapering base, finely 

 tomentose on both sides, but in age more glabrate above : stem leaves 

 small, linear, sessile, dentate, slightly auricled at the base : cyme 

 compound : the heads subumbellate at the ends of the branches, 

 7—8 mm. high, slightly floccose at the base : bracts yellowish, thin, 

 lanceolate, shorter than the disk : rays light yellow, short and 

 broad, 3—4 mm. long and 2 mm. wide : achenes striate, glabrous. 



A species related to 5. Fcndlcri, but characterized by the nar- 

 row, merely serrate basal leaves, the small subumbellate heads in 

 a short, flat-topped inflorescence with widely spreading ultimate 

 branches. It grows in the foothills at an altitude of about 1800 m. 

 [Plate 6, f. 6.] 



Colorado: J. Laramie Co., 1895, J. H. Cowcn (type in the 

 herbarium of N. Y. Botanical Garden). 



29. Senecio canovirens sp. nov. 



Stout perennial with a short erect rootstock, dark green, floc- 

 cose with more or less deciduous wool : stem 4—5 dm. high, looseh^ 

 floccose: basal leaves 5-12 cm. long, short-petioled ; blades lan- 

 ceolate or oblanceolate, sinuately toothed, dark green, firmly floc- 

 cose, in age almost glabrate above : lower stem leaves similar ; 

 upper ones linear, sinuately dentate with rather acute teeth : cyme 

 with erect or ascending branches : heads 7—8 mm. high, turbinate 

 campanulate ; bracts 12—14, oblong, linear, floccose at the base 

 and more or less villose, acute, brownish on the back and with 

 yellowish margins : rays 5—6 mm. long and 2 mm. wide, at first 

 orange, in age paler, 4— nerv^ed : achenes glabrous, striate. 



The type was determined by Prof. Greene as Scnccio Fciidlcri, 

 but it is very unlike the typical form of the aggregate that has been 

 known under that name. The dark green color, the leaves which 

 are merely toothed, never pinnatifid and still less bipinnatifid as 

 they often are in 6". Fcndlcri easily distinguish it from that species. 

 The perennial caudex and rootstock are similar to that of 5. Fcnd- 

 lcri but less thick and less woody and, as far as seen from the 

 specimens, not branched. It grows at an altitude of about 2000 

 m. [Plate 6, f. 9.] 



New Mexico: White Mountains, 1897, F. O. Wooton, 2^4. 

 (type in the herbarium of N. Y. Botanical Garden) ; Organ Moun- 

 tains, ^pj. 



Colorado: Pike's Peak, 1895, Mrs. S. L. Clarke. 



